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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests - Additional Information (Detail) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
May 31, 2016 USD ($) Hospital | Jun. 30, 2016 USD ($) Hospital
Noncontrolling Interest [Line Items] |  |
Non-controlling interest balances |  | $ 65
Redeemable non-controlling interest balances |  | $ 9
Minimum |  |
Noncontrolling Interest [Line Items] |  |
Ownership interests purchased |  | 26.10%
Maximum |  |
Noncontrolling Interest [Line Items] |  |
Ownership interests purchased |  | 27.50%
Acute Care Hospital Services | Las Vegas, Nevada |  |
Noncontrolling Interest [Line Items] |  |
Number of hospital facilities | Hospital | 6 | 6
Payments to purchase minority ownership interests | $ 445 | $ 445
Purchase price of minority ownership interests | 418 | 418
Return of reserve capital to purchase of minority ownership interests | $ 27 | $ 27
Percentage of noncontrolling, minority ownership interests held by outside owners |  | 5.00%
Acute Care Hospital Services | Las Vegas, Nevada | Minimum |  |
Noncontrolling Interest [Line Items] |  |
Ownership interests purchased |  | 26.10%
Acute Care Hospital Services | Las Vegas, Nevada | Maximum |  |
Noncontrolling Interest [Line Items] |  |
Ownership interests purchased |  | 27.50%
Acute Care Hospital Services | Washington, District of Columbia |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners |  | 20.00%
Acute Care Hospital Services | Laredo, Texas |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners |  | 11.00%
Behavioral Health Services | Philadelphia, Pennsylvania |  |
Noncontrolling Interest [Line Items] |  |
Percentage of noncontrolling, minority ownership interests held by outside owners |  | 20.00%

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